136 MUFFLE OF DENDROLAGUS the latter. Dorcopsis is confined to New Guinea, and contains three species, viz. 2). muelleri, D. liictuosa, and D. macleani. D. muelleri lias a striking resemblance to Macropus l)runii> with which it has been confounded. Though intermediate between Macropus and Dendrolctgus, these Kangaroos are not arboreal. The genus Dendrolag-us is remarkable for its Tin-kangaroo-like habit of living in trees. In accordance with this change of habit is a relative shortening of the hind-limbs, a feature which Fia. 67.-—Tree-Kangaroo. Dendrolagrus tenmetti. x -j^. begins to "be observable in Dorcopsis. " The general build/* writes Mr. Thomas, "is of the ordinary inammalian proportions, not macropodiform at all." The muffle is not naked for the greater part, though the shortness of the hairs gives that effect. As in Dorcopsis, but not as in Macropus, the bulla tyinpani is not swollen. There are altogether five species, the fifth, D. lennetti, having been lately described from specimens living in the Zoo- logical Society's Gardens. The anatomy of this genus has been described by Owen for 2). in'Matus* and by myself for D, lennetti. The stomach, which 1 Piroc. jgbol. JSfoc. 1852, p. 103.